A new dominant omicron strain in the U.S. is driving up cases — and reinfections
BA.5 is now the dominant omicron strain in the U.S. It's good at evading the immune system, though doesn't appear to cause more serious illness.
reinfection
Coronavirus FAQ: I got COVID. Then I got it again. What's the deal with reinfection?
People who catch COVID may feel as if they won't get it again, at least not for a long time. Their immune system should be primed to fight it off in the future. Right? Well, let's see.